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Category:MEETING MINUTES & NOTES--CORRESPONDENCE
MONTHYEARML20206S6461999-02-17017 February 1999
Summary of ACRS Reliability & Probabilistic Risk Assessment, Plant Operations & on Regulatory Policies & Practices Subcommittees 981119-20 Meeting in Rockville,Md Re Options Make 10CFR50 & 10CFR50.59 risk-informed
ML20206S4381999-01-25025 January 1999
Summary of 458th ACRS Meeting on 981203-05 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda
ML20206S6611999-01-11011 January 1999
Summary of 981215-17 ACRS Thermal Hydraulic Phenomena Subcommittee Meeting in Rockville,Md Re T/H Code Activities/ NRC T/H Research Status
ML20206S6101998-12-23023 December 1998
Summary of ACRS Reliability & Probabilistic Risk Assessment Subcommittee 981029 Meeting in Rockville,Md Re Options to Make 10CFR50 risk-informed,NEI Whole Plant Study & Options for Developing risk-informed Approach,Revising 10CFR50.59
ML20206S8501998-11-13013 November 1998
Summary of 456th ACRS Meeting on 980930-1002 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda
ML20206S7621998-11-12012 November 1998
Summary of 980924 ACRS Submommittee on Reliability & PRA Open Meeting in Rockville,Md Re Proposed Options for Developing risk-informed Approach to Revising 10CFR50.59, Options for Broader Changes to 10CFR50
ML20206S2481998-11-12012 November 1998
Summary of 455th ACRS Meeting on 980902-04 in Rockville,Md Re Items Listed in Attached Agenda
ML20206S4161998-09-29029 September 1998
Summary of 980826 Open ACRS Subcommittee on Reliability & PRA Meeting in Rockville,Md Re Issues in SRM on situation-specific Cases Where PRA Results & Insights Have Improved Existing Regulatory Sys
ML20206S3851998-09-0303 September 1998
Summary of 980729 Open ACRS Joint Meeting of Subcommittees on Plant Operations & Fire Protection in Atlanta,Ga Re Region II Activities & Other Items of Mutual Interest, Including Significant Operating Events & Fire Protection
ML20206S6831998-09-0101 September 1998
Summary of 453rd ACRS Meeting on 980603-05 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda
ML20206S3761998-08-24024 August 1998
Summary of 980716 ACRS Plant License Renewal Subcommittee Meeting in Rockville,Md Re Presentations by & Holding Discussions with NRC Staff Re License Renewal,Proposed Staff Plans & Schedule for Reviewing License Renewal Applications
ML20206S3811998-08-0404 August 1998
Summary of ACRS Safety Research Program Subcommittee Meeting on 980717 in Rockville,Md Re Comments & Recommendations in 980616 ACRS Rept, Core Research Capabilities & Associated Staff Response
ML20206S3721998-07-29029 July 1998
Summary of 980707 ACRS Advanced Reactor Designs Subcommittee Meeting in Rockville,Md Re Info on AP600 Test & Analysis Program & Responses to ACRS Questions Asked During Previous Meetings
ML20206S6721998-07-0808 July 1998
Summary of ACRS Safety Research Program Subcommittee 980601 Meeting in Rockville,Md Re Discussion with NRC Concerning SECY-98-076, Core Research Capabilities
ML20206S3671998-06-30030 June 1998
Summary of 980619 Open ACRS Meeting of Subcommittee on Plant Operations in Rockville,Md Re Proposed Changes to 10CFR50.59,status of Resolution of Issues Identified in 980324 SRM Related to SECY-97-205 & Related Matters
ML20206S3501998-06-26026 June 1998
Summary of 980617-18 ACRS Advanced Reactor Designs Subcommittee Meeting in Rockville,Md Re Review of Advance FSER Chapters 4,5,7,8,11,13 & 18,level 1 AP600 Pra,Itaac & Associated ACRS Open Questions
ML20206S5991998-06-23023 June 1998
Summary of ACRS Reactor Fuels,Onsite Fuel Storage & Decommissioning Subcommittee 980423-24 Meeting in Rockville, MD Re Basis of Proposed NRC Fuel Failure Criterion for High Burnup Conditions & Adequacy of NRC Fuel Codes
ML20206S6411998-06-22022 June 1998
Summary of 980601 ACRS Matls & Metallurgy Subcommittee Meeting in Rockville,Md Re NRC Staff Concerns Related to ASME Boiler & Pressure Vessel Code,Section III Rule Revs
ML20206S3361998-06-22022 June 1998
Summary of 980611-12 Open ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommittee Meeting in Rockville,Md Re Continuance of Review of Results of W Test & Analysis Program in Support of AP600 Design Certification
ML20206S6301998-06-17017 June 1998
Summary of 980602 ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommitteemeeting in Rockville,Md Re GE Extended Power Uprate Program for Operating BWRs & NSP lead-plant Application for Power Uprate
ML20206S2561998-06-17017 June 1998
Summary of 452nd ACRS Meeting on 980430-0502 in Rockville, MD Re Items Listed in Attached Agenda
ML20206S5761998-06-0404 June 1998
Summary of ACRS Reliability & Probabilistic Risk Assessment Subcommittee 980416 Meeting in Rockville,Md Re Subcommittees Review of Matters Related to Elevation of CDF & Possible Rev to Commissions Safety Goal Policy Statement
ML20206S5671998-05-30030 May 1998
Summary of ACRS Advanced Reactor Designs Subcommittee 980513-15 Meeting in Rockville,Md Re Review of AP600 Standard SAR & Associated Advanced FSER Chapters 3,6,14,16 & 17
ML20206S2521998-05-14014 May 1998
Summary of 451st ACRS Meeting on 980402-04 in Rockville,Md Re Items Listed in Attached Agenda
ML20206S2801998-04-30030 April 1998
Summary of 980219-20 ACRS Open Meeting of Subcommittee on Reliability & Probabilistic Risk Assessment in Rockville,Md Re Continuance of Review of Proposed Final SRP Sections & RGs for risk-informed,performance-based Regulation
ML20206S2951998-04-15015 April 1998
Summary of 450th ACRS Meeting on 980305-07 in Rockville,Md Re Items Listed in Attached Agenda
ML20206S2871998-04-15015 April 1998
Summary of 449th ACRS Meeting on 980302-04 in Rockville,Md Re Items Listed in Attached Agenda
ML20206S6481998-03-26026 March 1998
Summary of ACRS Fire Protection Subcommittee 980122 Meeting in Rockville,Md Re Staff Actions Taken Related to Development of Revised Fire Protection Rule
ML20196L0531998-03-20020 March 1998
Summary of 980205-07 ACRS 448th Meeting in Rockville,Md Re Items Listed in Attached Agenda
ML20206S6561998-03-13013 March 1998
Summary of ACRS Plant License Renewal Subcommittee 980123 Meeting in Rockville,Md Re License Renewal Implementation Issues & Proposed Industry Guidelines
ML20206S2751998-03-0909 March 1998
Summary of 980218 ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommittee Open Meeting in Rockville,Md Re Review of RES Program in Area of thermal-hydraulic Phenomena in Support of ACRS Planned Rept to Commission
ML20206S6791998-03-0505 March 1998
Summary of ACRS Plant Operations Subcommittee 980203 Meeting in Rockville,Md Re Subcommittee Review of Proposed Improvements to Senior Mgt Meeting Process
ML20217A8561998-03-0505 March 1998
Summary of ACRS 448th Meeting on 980205-07 Re Several Matters & Completed Listed Rept & Ltr.Committee Authorized Larkins,Executive Director,To Transmit Memoranda Listed
ML20206S2651998-02-23023 February 1998
Summary of 980203-04 ACRS Subcommittee on Advanced Reactor Designs Open Meeting in Rockville,Md Re Review of Chapters 1,4,5,7,8,11,13 & 18 of AP600 SSAR & AP600 Test & Analysis Program
IR 07100203/20064471998-02-0505 February 1998
Summary of 971203-06 447th ACRS Meeting in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda
ML20206S3931998-01-28028 January 1998
Summary of 980121 ACRS Subcommitee on Human Factors Meeting in Rockville,Md Re Human Performance & Reliability Plan & Integration of Human Factors Insights Into Insp Process
ML20217A8461998-01-0909 January 1998
Summary of ACRS Plant Operations Subcommittee 971202 Meeting in Rockville,Md Re SER on industry-sponsored Utility Resolution Guidance for Issue of Blockage of Suction Strainer in ECCS
ML20217A8771997-12-23023 December 1997
Summary of ACRS 446th Meeting on 971106-07 in Rockville,Md Re Appropriate Action on Items Listed on Attached Agenda.W/ Fr Notice,Meeting Schedule & Outline,List of Attendees, Future Agenda & List of Documents Provided to Committee
ML20217A9911997-12-23023 December 1997
Summary of 447th ACRS Meeting on 971203-06 Re Proposed Revs to 10CFR50.59 & Credit for Containment Overpressure to Provide Assurance of Sufficient Net Positive Suction Head for ECC & Containment Heat Removal
ML20217A8651997-12-15015 December 1997
Summary of ACRS Reliability & PRA Subcommittee 971112-13 Meeting in Rockville,Md Re Proposed Final SRP for risk- informed,performance-based Regulation
ML20217A9831997-12-0303 December 1997
Summary of 971203 ACRS Meeting in Rockville,Md Re Conduct of ACRS Business
ML20217A8811997-12-0202 December 1997
Summary of ACRS Safety Research Program Subcommittee 971104- 05 Meeting in Rockville,Md Re NRC Safety Research Program & Draft Annual Rept to Congress
ML20217A5901997-12-0202 December 1997
Summary of 445th ACRS Meeting in Rockville,Md on 971002-03 Re Appropriate Action on Items Listed in Attached Agenda.W/ Fr Notice,Meeting Schedule & Outline,List of Attendees, Future Agenda & List of Documents Provided to Committee
ML20217A8221997-12-0101 December 1997
Informs That During 446th Meeting on 971106-07,ACRS Discussed Several Matters & Completed Listed Ltr. Committee Authorized Larkins,Executive Director,To Transmit Memoranda,Listed
ML20217A8901997-11-21021 November 1997
Summary of ACRS Reliability & PRA 971021-22 Meeting in Rockville,Md Re Matter Included in Staff Requirements Memo,
ML20217B1921997-11-0606 November 1997
Summary of ACRS Planning & Procedures Subcommitte 971105 Meeting in Rockville,Md Re Conduct of ACRS Business
ML20217A6381997-11-0606 November 1997
Summary of 444th ACRS Meeting in Rockville,Md on 970903-05 Re Appropriate Action Items Listed in Attached Agenda.W/Fr Notice,Meeting Schedule & Outline,List of Attendees & List of Documents Provided to Committee
ML20217A8001997-10-21021 October 1997
Informs That During 445th Meeting on 971002-03,ACRS Discussed Several Matters & Completed Listed Rept & Ltrs. Committee Authorized Larkins,Executive Director,To Transmit Memoranda Listed
ML20217A8141997-10-20020 October 1997
Summary of ACRS Subcommittees on Pra,Plant Operations & Fire Protection 970828-29 Meeting in Rockville,Md Re Review of Staff Requirements Memo
ML20217A7011997-10-20020 October 1997
Summary of 970826-27 ACRS Subcommittees on Matls & Metallurgy & on Severe Accidents Joint Meeting W/Nrc,Nei & Industry in Rockville,Md Re Review of Proposed Draft GL & Associated Draft Regulatory Guide Re SG Tube Integrity
1999-02-17
[Table view]Some use of "" in your query was not closed by a matching "".
Category:MEETING SUMMARIES-INTERNAL (NON-TRANSCRIPT)
MONTHYEARML20206S6461999-02-17017 February 1999
Summary of ACRS Reliability & Probabilistic Risk Assessment, Plant Operations & on Regulatory Policies & Practices Subcommittees 981119-20 Meeting in Rockville,Md Re Options Make 10CFR50 & 10CFR50.59 risk-informed
ML20206S4381999-01-25025 January 1999
Summary of 458th ACRS Meeting on 981203-05 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda
ML20206S6611999-01-11011 January 1999
Summary of 981215-17 ACRS Thermal Hydraulic Phenomena Subcommittee Meeting in Rockville,Md Re T/H Code Activities/ NRC T/H Research Status
ML20206S6101998-12-23023 December 1998
Summary of ACRS Reliability & Probabilistic Risk Assessment Subcommittee 981029 Meeting in Rockville,Md Re Options to Make 10CFR50 risk-informed,NEI Whole Plant Study & Options for Developing risk-informed Approach,Revising 10CFR50.59
ML20206S8501998-11-13013 November 1998
Summary of 456th ACRS Meeting on 980930-1002 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda
ML20206S7621998-11-12012 November 1998
Summary of 980924 ACRS Submommittee on Reliability & PRA Open Meeting in Rockville,Md Re Proposed Options for Developing risk-informed Approach to Revising 10CFR50.59, Options for Broader Changes to 10CFR50
ML20206S2481998-11-12012 November 1998
Summary of 455th ACRS Meeting on 980902-04 in Rockville,Md Re Items Listed in Attached Agenda
ML20206S4161998-09-29029 September 1998
Summary of 980826 Open ACRS Subcommittee on Reliability & PRA Meeting in Rockville,Md Re Issues in SRM on situation-specific Cases Where PRA Results & Insights Have Improved Existing Regulatory Sys
ML20206S3851998-09-0303 September 1998
Summary of 980729 Open ACRS Joint Meeting of Subcommittees on Plant Operations & Fire Protection in Atlanta,Ga Re Region II Activities & Other Items of Mutual Interest, Including Significant Operating Events & Fire Protection
ML20206S6831998-09-0101 September 1998
Summary of 453rd ACRS Meeting on 980603-05 in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda
ML20206S3761998-08-24024 August 1998
Summary of 980716 ACRS Plant License Renewal Subcommittee Meeting in Rockville,Md Re Presentations by & Holding Discussions with NRC Staff Re License Renewal,Proposed Staff Plans & Schedule for Reviewing License Renewal Applications
ML20206S3811998-08-0404 August 1998
Summary of ACRS Safety Research Program Subcommittee Meeting on 980717 in Rockville,Md Re Comments & Recommendations in 980616 ACRS Rept, Core Research Capabilities & Associated Staff Response
ML20206S3721998-07-29029 July 1998
Summary of 980707 ACRS Advanced Reactor Designs Subcommittee Meeting in Rockville,Md Re Info on AP600 Test & Analysis Program & Responses to ACRS Questions Asked During Previous Meetings
ML20206S6721998-07-0808 July 1998
Summary of ACRS Safety Research Program Subcommittee 980601 Meeting in Rockville,Md Re Discussion with NRC Concerning SECY-98-076, Core Research Capabilities
ML20206S3671998-06-30030 June 1998
Summary of 980619 Open ACRS Meeting of Subcommittee on Plant Operations in Rockville,Md Re Proposed Changes to 10CFR50.59,status of Resolution of Issues Identified in 980324 SRM Related to SECY-97-205 & Related Matters
ML20206S3501998-06-26026 June 1998
Summary of 980617-18 ACRS Advanced Reactor Designs Subcommittee Meeting in Rockville,Md Re Review of Advance FSER Chapters 4,5,7,8,11,13 & 18,level 1 AP600 Pra,Itaac & Associated ACRS Open Questions
ML20206S5991998-06-23023 June 1998
Summary of ACRS Reactor Fuels,Onsite Fuel Storage & Decommissioning Subcommittee 980423-24 Meeting in Rockville, MD Re Basis of Proposed NRC Fuel Failure Criterion for High Burnup Conditions & Adequacy of NRC Fuel Codes
ML20206S6411998-06-22022 June 1998
Summary of 980601 ACRS Matls & Metallurgy Subcommittee Meeting in Rockville,Md Re NRC Staff Concerns Related to ASME Boiler & Pressure Vessel Code,Section III Rule Revs
ML20206S3361998-06-22022 June 1998
Summary of 980611-12 Open ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommittee Meeting in Rockville,Md Re Continuance of Review of Results of W Test & Analysis Program in Support of AP600 Design Certification
ML20206S6301998-06-17017 June 1998
Summary of 980602 ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommitteemeeting in Rockville,Md Re GE Extended Power Uprate Program for Operating BWRs & NSP lead-plant Application for Power Uprate
ML20206S2561998-06-17017 June 1998
Summary of 452nd ACRS Meeting on 980430-0502 in Rockville, MD Re Items Listed in Attached Agenda
ML20206S5761998-06-0404 June 1998
Summary of ACRS Reliability & Probabilistic Risk Assessment Subcommittee 980416 Meeting in Rockville,Md Re Subcommittees Review of Matters Related to Elevation of CDF & Possible Rev to Commissions Safety Goal Policy Statement
ML20206S5671998-05-30030 May 1998
Summary of ACRS Advanced Reactor Designs Subcommittee 980513-15 Meeting in Rockville,Md Re Review of AP600 Standard SAR & Associated Advanced FSER Chapters 3,6,14,16 & 17
ML20206S2521998-05-14014 May 1998
Summary of 451st ACRS Meeting on 980402-04 in Rockville,Md Re Items Listed in Attached Agenda
ML20206S2801998-04-30030 April 1998
Summary of 980219-20 ACRS Open Meeting of Subcommittee on Reliability & Probabilistic Risk Assessment in Rockville,Md Re Continuance of Review of Proposed Final SRP Sections & RGs for risk-informed,performance-based Regulation
ML20206S2951998-04-15015 April 1998
Summary of 450th ACRS Meeting on 980305-07 in Rockville,Md Re Items Listed in Attached Agenda
ML20206S2871998-04-15015 April 1998
Summary of 449th ACRS Meeting on 980302-04 in Rockville,Md Re Items Listed in Attached Agenda
ML20206S6481998-03-26026 March 1998
Summary of ACRS Fire Protection Subcommittee 980122 Meeting in Rockville,Md Re Staff Actions Taken Related to Development of Revised Fire Protection Rule
ML20196L0531998-03-20020 March 1998
Summary of 980205-07 ACRS 448th Meeting in Rockville,Md Re Items Listed in Attached Agenda
ML20206S6561998-03-13013 March 1998
Summary of ACRS Plant License Renewal Subcommittee 980123 Meeting in Rockville,Md Re License Renewal Implementation Issues & Proposed Industry Guidelines
ML20206S2751998-03-0909 March 1998
Summary of 980218 ACRS Thermal Hydraulic & Severe Accident Phenomena Subcommittee Open Meeting in Rockville,Md Re Review of RES Program in Area of thermal-hydraulic Phenomena in Support of ACRS Planned Rept to Commission
ML20206S6791998-03-0505 March 1998
Summary of ACRS Plant Operations Subcommittee 980203 Meeting in Rockville,Md Re Subcommittee Review of Proposed Improvements to Senior Mgt Meeting Process
ML20217A8561998-03-0505 March 1998
Summary of ACRS 448th Meeting on 980205-07 Re Several Matters & Completed Listed Rept & Ltr.Committee Authorized Larkins,Executive Director,To Transmit Memoranda Listed
ML20206S2651998-02-23023 February 1998
Summary of 980203-04 ACRS Subcommittee on Advanced Reactor Designs Open Meeting in Rockville,Md Re Review of Chapters 1,4,5,7,8,11,13 & 18 of AP600 SSAR & AP600 Test & Analysis Program
IR 07100203/20064471998-02-0505 February 1998
Summary of 971203-06 447th ACRS Meeting in Rockville,Md Re Appropriate Action on Items Listed in Attached Agenda
ML20206S3931998-01-28028 January 1998
Summary of 980121 ACRS Subcommitee on Human Factors Meeting in Rockville,Md Re Human Performance & Reliability Plan & Integration of Human Factors Insights Into Insp Process
ML20217A8461998-01-0909 January 1998
Summary of ACRS Plant Operations Subcommittee 971202 Meeting in Rockville,Md Re SER on industry-sponsored Utility Resolution Guidance for Issue of Blockage of Suction Strainer in ECCS
ML20217A8771997-12-23023 December 1997
Summary of ACRS 446th Meeting on 971106-07 in Rockville,Md Re Appropriate Action on Items Listed on Attached Agenda.W/ Fr Notice,Meeting Schedule & Outline,List of Attendees, Future Agenda & List of Documents Provided to Committee
ML20217A9911997-12-23023 December 1997
Summary of 447th ACRS Meeting on 971203-06 Re Proposed Revs to 10CFR50.59 & Credit for Containment Overpressure to Provide Assurance of Sufficient Net Positive Suction Head for ECC & Containment Heat Removal
ML20217A8651997-12-15015 December 1997
Summary of ACRS Reliability & PRA Subcommittee 971112-13 Meeting in Rockville,Md Re Proposed Final SRP for risk- informed,performance-based Regulation
ML20217A9831997-12-0303 December 1997
Summary of 971203 ACRS Meeting in Rockville,Md Re Conduct of ACRS Business
ML20217A8811997-12-0202 December 1997
Summary of ACRS Safety Research Program Subcommittee 971104- 05 Meeting in Rockville,Md Re NRC Safety Research Program & Draft Annual Rept to Congress
ML20217A5901997-12-0202 December 1997
Summary of 445th ACRS Meeting in Rockville,Md on 971002-03 Re Appropriate Action on Items Listed in Attached Agenda.W/ Fr Notice,Meeting Schedule & Outline,List of Attendees, Future Agenda & List of Documents Provided to Committee
ML20217A8221997-12-0101 December 1997
Informs That During 446th Meeting on 971106-07,ACRS Discussed Several Matters & Completed Listed Ltr. Committee Authorized Larkins,Executive Director,To Transmit Memoranda,Listed
ML20217A8901997-11-21021 November 1997
Summary of ACRS Reliability & PRA 971021-22 Meeting in Rockville,Md Re Matter Included in Staff Requirements Memo,
ML20217A6381997-11-0606 November 1997
Summary of 444th ACRS Meeting in Rockville,Md on 970903-05 Re Appropriate Action Items Listed in Attached Agenda.W/Fr Notice,Meeting Schedule & Outline,List of Attendees & List of Documents Provided to Committee
ML20217B1921997-11-0606 November 1997
Summary of ACRS Planning & Procedures Subcommitte 971105 Meeting in Rockville,Md Re Conduct of ACRS Business
ML20217A8001997-10-21021 October 1997
Informs That During 445th Meeting on 971002-03,ACRS Discussed Several Matters & Completed Listed Rept & Ltrs. Committee Authorized Larkins,Executive Director,To Transmit Memoranda Listed
ML20217A8141997-10-20020 October 1997
Summary of ACRS Subcommittees on Pra,Plant Operations & Fire Protection 970828-29 Meeting in Rockville,Md Re Review of Staff Requirements Memo
ML20217A7011997-10-20020 October 1997
Summary of 970826-27 ACRS Subcommittees on Matls & Metallurgy & on Severe Accidents Joint Meeting W/Nrc,Nei & Industry in Rockville,Md Re Review of Proposed Draft GL & Associated Draft Regulatory Guide Re SG Tube Integrity
1999-02-17
[Table view]Some use of "" in your query was not closed by a matching "". |
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July 8, 1998 Date Issued: June 22, 1998
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i ADVISORY COMMITTEE ON REACTOR SAFEGUARDS MATERIALS AND METALLURGY SUBCOMMITTEE MEETING MINUTES l
JUNE 1. 1998 i
ROCKVILLE. MARYLAND The ACRS Subcommittee on Materials and Metallurgy met on June 1.1998, at 11545 Rockville Pike, Rockville, Maryland, in Room T-2B3, The purpose of the i
meeting was to review the NRC staff's concerns related to the ASME Boiler and Pressure Vessel Code Section III rule revisions, which are contained in the 1994 Addenda for Class 1, 2, and 3 piping systems.- Mr. Noel Dudley was the cognizant ACRS staff engineer for this meeting. The meeting was convened at 1:30 p.m. and adjourned at 6:15 p.m. on June 1, 1998.
ATTENDEES ACES W. Shack. Chairman D. Powers, Member M. Fontana. Member N. Dudley, Staff Engineer T. Kress. Member NRC STAFF L. Shao, RES K. Jaguay, Casco Services R. Wessman. NRR R. Kennedy, Structural Mechanics N. Chokshi, RES Consulting Inc.
ASME and JAPANESE G. Eisenberg, ASME Y Asada, University of Tokyo R. Barnes. ASME
- 0. Oyamada. Hitachi Ltd.
T. Yamazaki. Hokuriku Electric Power Co.
There were no written comments or requests for time to make oral statements received from members of the public. An attendance list of the NRC staff and F
public is available in the ACRS office files and will be made available upon request.
SUBCOMMITTEE CHAIRMAN INTRODUCTION 5
y" CYq Dr. William Shack. Subcommittee Chairman, convened the meeting at 1:30 p.m.
and recognized the representatives of the American Society of Mechanical l
Engineers (ASME) and Japan who would participate in the meeting.
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DESIG HTED ORIGINAL,
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, Materials and Metallurgy Subcommittee 2
June 1. 1998 l
NRC STAFF PRESENTATION Dr. Larry Shao. RES, stated that the NRC has concerns with the ASME 1994 Addenda that revised piping seismic design criteria.
He explained that the
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NRC sponsored research project, which was initiated to review the technical j
basis of the new design criteria, had been completed.
Mr. Richard Wessman.
NRR. noted that for the last two years, two NRC engineers had been assigned as liaisons to the ASME Special Working Group for Seismic Rules (SWG-SR), which was reassessing the ASME 1994 Addenda-.
s PIPING SEISMIC DESIGN CRITERIA - Mr. Nilesh C. Chokshi RES Mr. Nilesh C. Chokshi. RES. explained that the NRC staff's concerns were related to the ASME 1994 Addenda, which specifies significantly higher allowable stresses for seismic piping designs than those previously specified.
He stated that the NRC staff has not accepted the revised criteria because of technical concerns.
Mr. Chokshi presented the background and chronology of the piping seismic design criteria.
He explained that the major assumption in the new criteria is that piping fails in fatigue or fatigue ratcheting modes but not in a collapse mode. Mr. Chokshi stated that there was insufficient test data to support that assumption and that there was little basis for establishing a minimum desi-A rgin
.He noted that the NRC initiated a research program at the Energy Technology Engineering Center (ETEC) in 1993 to evaluate test data and to develop an approach for establishing minimum design margin.
He stated that the program findings confirmed the NRC concerns related to the 1994 Addenda.
The Subcommittee members and the staff discussed what test data the NRC research program reviewed.
NUREG/CR-5361: SEISMIC ANALYSIS OF PIPING - Mr. Ken Jaquay. Casco Services Mr. Ken Jaquay. Casco Services, provided an overview of the contents of lp NUREG/CR-5361 " Seismic Analysis of Piping." He explained that the 1994 Addenda increased the allowable values for the inertia loads used in the Service Level D Equation and the weight momentum stress (B ).
Based on work 2
done by ETEC and the associated Peer Review Group. Mr. Jaquay identified the following areas of critical deficiency:
component fragility test extrapolation for ratchet-fatigue margin.
a pipe collapse failure mode.
acceptable piping system margins, i
L
h L.,
j
,Materipls and Metallurgy Subcomittee 3
June 1. 1998 B values for straights and girth butt welds.
2 high temperature carbon steel moment capacity.
prior service fatigue damage, and 1ack of excluded coverage.
)
i He concluded that the areas of critical deficiency should be studied in more detail prior to adopting changes to the piping regulations. Mr. Jaguay
)
completed his presentation by showing a video tape of experimental tests where
.l a pipe collapsed.
d The Subcommittee members, the NRC staff. ASME representatives, and Mr. Jaauay I
discussed the_following:
. effects of cracks not being present in the areas of stress.
predictions of the failures seen in the experimental. tests.
a prediction of margins using test data with large scatter.
1994 Addenda applicability to an equation that assumes constant stress.
interaction between fatigue and ratchet fatigue, and effect on the experiment test results of pressurizing the pipe sections.
)
RISK BASED APPROACH TO SEISMIC DESIGN CRITERIA FOR PIPING Dr. Robert-P. Kennedy. Structural Mechanical Consulting. Inc.
Dr. Robert P. Kennedy. Structural Mechanical Consulting. Inc., presented a framework for-establishing piping seismic design criteria, which are sufficiently conservative to avoid piping becoming a significant contributor j
to the seismic risk. He derived the required piping code capacity factor of
. safety defined in terms of 1% probability of failure capacity (Rcp n) and recommended a value of about 2.0.
Dr. Kennedy used component test data and his recommended value for Rcpa to establish a code criteria to achieve the desired seismic capacity margin.
He j
noted that the elbow test data (B >3.0) and non-elbow test data (B -1.0) were i
2 2
not part of the same homogeneous data set and could not be combined. However.,
Dr. Kennedy proposed replacing B for oscillatory dynamics loads on non-elbow f
2 piping with B*2 = B or 2.0. whichever is greater.. With the proposed change.
2 Dr. Kennedy believed it was reasonable to combine elbow and'non-elbow data.
He. concluded that a strength factor can be reasonably extrapolated ~from test data to be about l'.5.
Dr. Kennedy compared his conclusion with nonlinear l
L studies done by Dr. Wilfred Iwan from Caltech.
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Materials and Metallurgy Subcomittee 4
June 1. 1998 i
He recommended that the value for B be varied based on test data to remove 2
some of the conservatism from the code.
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- on this recommendation the average number of piping supports required by the design code could be reduced i
from 15 to 10.
The Subcommittee members, ASME representatives, and Dr. Kennedy discussed the following:
l the yield stresses used for stainless steel and carbon steel.
j use of B for nonlinear and cyclic loading.
1 2
treatment of the data point for the collapsed pipe.
effects of high temperature on stainless steel, fitting of the test data to a log-normal distribution, confidence level for the safety factors.
the larger displacement of more flexible piping systems, and effects of flaw distribution.
JAPANESE PROJECTS ON ELASTIC-PLASTIC SEISMIC DESIGN CRITERIA FOR NUCLEAR POWER PIPING - Drs. Y. Asada, University of Tokyo: T. Yamazaki. Hokuriku Electric Power Company; and O. 0yamada. Hitachi Ltd.
Dr. Y. Asada. University of Tokyo, explained the concept of super-imposing steady state stresses due to operating loads on reversing stresses due to seismic loads.
He showed the resulting strain behavior on a pipe caused by high reversing stresses in the elastic-plastic region and indicated that the pipe would undergo fatigue failure.
Dr. Asada presented his Asada equation for fatigue and ductility damage.
He explained the process the Japanese were following to establish new seismic design criteria. The process includes material specimen tests, static and dynamic cyclic loading tests, analyses.
predictions, numerical simulations, and standardization of new seismic rules.
Dr. T. Yamazaki, Hokuriku Electric Power Company, provided an outline of the Japanese test program. All dynamic tests were conducted under displacement control and failed by ratcheting fatigue.
Both static and dynamic test P
results showed the same elastic-plastic and failure behavior.
Dr. Yamazaki presented the program schedule, which includes additional component tests, L
seismic proving tests, and development of new rules. He stated that the Japanese plan to continue technical discussions with ASME on the new piping seismic rules.
Dr. Yamazaki narrated a video of several test that resulted in pipe failures and presented the results of the tests.
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, Mater 1,als and Metallurgy Subcomittee 5
June 1. 1998 The Subcommittee. ASME representatives NRC staff, and the Japanese discussed the following:
why bent pipes were used in the test instead of elbows, what value of B was used in the tests.
2 whether the tests results excluded the possibility of piping collapse, the results of high temperature tests, and a
the results of test analyses.
AMERICAN SOCIETY OF MECHANICAL ENGINEERS - Mr. Richard Barnes, ASME Mr. Richard Barnes. ASME, explained the standards development process in
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general and the development of the 1994 Addenda in pa'rticular.
He presented the engineering and experimental expertise required to develop an ASME standard.
Mr. Barnes presented test results that support the 1994 Addenda.
He stated that the existing rules need to be refined based on Dr. Kennedy's, recommendations, and that most short term action items listed in NUREG/CR-1061 can be accommodated by ASME Committee action.
He noted that the ASME SWG-SR is open to all input on the seismic rule issue.
Mr. Barnes stated that it is fundamentally important that all stakeholders maintain an active status in the standards development process.
The Subcommittee members, the NRC staff, and Mr. Barnes discussed the following:
how the 1994 Addenda was published with outstanding objections.
what consensus means.
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use of expert elicitation in the standards development process.
reduced level of NRC involvement in the ASME SWG-SR, and impact of seismic rules on new plants.
STAFF AND INDUSTRY COMMITMENTS The staff and the ASME representatives committed to keep the Subcommittee
.3 informed of the progress made by the ASME SWG-SR, SUBCOMMITTEE DECISIONS The Subcommittee decided to schedule a briefing on the proposed ASME Code change after the ASME SWG-SR reaches a consensus and the results of the l
Japanese analyses of their test data become available.
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Materials and Metallurgy Subcommittee 6
June 1, 1998 FOLLOW UP ACTIONS
. No follow up actions were identified.
PRESENTATION SLIDES AND HANDOUTS PROVIDED DURING THE MEETING The presentation slides and handouts used during.the meeting are available in the ACRS office-files or'as attachments to the transcript.
BACKGROUND MATERIAL PROVIDED TO THE SUBCOMMITTEE 1.
Letter dated May 24, 1995, from Brian W.
Sheron, NRR to G.M.
Eisenberg, Director. Nuclear Codes and Standards. ASME,
Subject:
ASME Code Revisions to the Design Rules for Piping Systems.
2.
U.S. Nuclear Regulatory Commission NUREG/CR-5361, " Seismic Analysis of Piping," published May 1998.
NOTE: Additional details of this meet-ing can be obtained from a transcript available in the NRC Public Document Room. 2120 L Street. N.W.,
Washington, D.C. 20006. (202) 634-3274, or can be purchased from Ann Riley & Associates. LTD., 1250 I Street. N.W.
Suite 300, Washington.
D.C. 20005. (202) 842-0034.
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